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Vishay Siliconix DG444BDJ
- Part No.:
- DG444BDJ
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
DG444BDJ.pdf
- Description:
- IC SWITCH SPST-NCX4 80OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
DG444BDJ from Vishay Siliconix is a monolithic quad SPST analog switch IC designed for bidirectional, low-error signal routing in precision analog systems. It features 45 Ω typical on-resistance, 120 ns typical turn-on time (with unipolar 12 V supply), and ±15 V dual-supply operation - enabling high-fidelity audio switching, data acquisition multiplexing, and sample-and-hold control in industrial instrumentation.
For engineers reviewing the DG444BDJ datasheet, DG444BDJ pinout, DG444BDJ application, or DG444BDJ equivalent, this device serves as a high-speed, low-charge-injection analog switch optimized for signal integrity in medical instruments, automatic test equipment, and communication front-ends where analog rail-to-rail switching and TTL/CMOS logic compatibility are required.
Technical Context
The DG444BDJ implements four independent SPST switches using Vishay's high-voltage silicon-gate CMOS process with epitaxial latchup protection. Each channel conducts equally in both directions when ON and blocks signals up to the supply rails when OFF.
It operates with dual supplies (±15 V) or unipolar supply (12 V), supports logic-level translation via separate VL pin (5 V), and minimizes charge injection (4 pC typ. at 8 V) to reduce pedestal error in sampling circuits - confirmed by test circuit Figure 3 and typical characteristics on page 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15 V (dual supply) or 0–12 V (unipolar): supports rail-to-rail analog signal switching without clipping |
| Drain-Source On-Resistance | 45 Ω typ. at ±15 V: ensures minimal signal attenuation and voltage drop in precision gain-setting paths |
| Turn-On Time | 120 ns typ. at 12 V supply: enables fast channel selection in high-throughput data acquisition systems |
| Charge Injection | 4 pC typ. at 8 V: limits pedestal error in sample-and-hold circuits with 1 nF hold capacitor |
| Off Isolation | –90 dB at 100 kHz: suppresses crosstalk between inactive and active channels in multi-channel AFEs |
| Logic Compatibility | TTL/CMOS input thresholds (0.8 V low / 2.4 V high): allows direct interfacing with microcontrollers and FPGAs without level shifters |
| Supply Current | ±1 µA max. I+ / I−: enables ultra-low-power operation in battery-backed instrumentation |
Pinout & Package
Package: 16-pin plastic DIP (JEDEC MS-012), 10.0 mm × 4.0 mm body, 2.54 mm lead pitch, through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (IN1–IN4) | Digital control inputs | Active-high logic: high = switch ON (DG444B function per truth table) |
| 5, 6, 13, 14 (S1–S4) | Switch source terminals | Input side of analog path; connect to signal source or multiplexer input |
| 7, 8, 11, 12 (D1–D4) | Switch drain terminals | Output side of analog path; connect to ADC input, amplifier, or hold capacitor |
| 9 (V−) | Negative supply rail | Bias reference for negative analog swing; must be connected even in unipolar mode |
| 10 (GND) | Analog/digital ground | Common reference for V−, VL, and digital logic return |
| 15 (V+) | Positive supply rail | Provides bias for positive analog swing; supports up to +15 V |
| 16 (VL) | Logic supply voltage | Independent 5 V rail for TTL/CMOS-compatible input stage; decoupling required |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance matching | 45 Ω typ., <15 % channel-to-channel variation: preserves gain accuracy in programmable-gain amplifier topologies |
| Low charge injection | 4 pC typ. at 8 V: reduces hold-mode settling error to <0.01 % FS in 12-bit sample-and-hold designs |
| High off-isolation | –90 dB at 100 kHz: prevents signal bleed between channels in 16-channel medical sensor arrays |
| Latchup immunity | Epitaxial layer isolation: guarantees robust operation under transient overvoltage conditions in industrial environments |
| Wide supply flexibility | Supports ±15 V dual or 0–12 V single supply: simplifies power architecture in mixed-signal PCBs |
Applications
| Audio Switching | Data Acquisition |
|---|---|
Use Scenario: Routing line-level stereo signals between multiple codecs, amplifiers, or DAC outputs in professional audio mixers. IC Role / Device Role / Timing Role: Quad SPST analog switch providing silent, glitch-free channel selection with sub-120 ns transition. Use Value: 45 Ω RDS(on) and <4 pC charge injection preserve dynamic range and minimize pop/click artifacts during switching. |
Use Scenario: Multiplexing 16 analog sensor inputs into a single 12-bit SAR ADC in environmental monitoring systems. IC Role / Device Role / Timing Role: High-speed analog switch enabling sequential sampling with minimal channel crosstalk and settling delay. Use Value: –90 dB off-isolation and 120 ns tON ensure accurate inter-channel separation and throughput >10 kSPS per channel. |
| Sample-and-Hold Circuits | Medical Instrumentation |
Use Scenario: Controlling the sampling gate in a precision ECG front-end, holding analog voltage for digitization. IC Role / Device Role / Timing Role: Low-charge-injection analog switch isolating the hold capacitor during acquisition phase. Use Value: 4 pC typical charge injection limits pedestal error to <10 µV on 1 nF hold capacitor - critical for <0.1 % gain accuracy. |
Use Scenario: Signal routing in portable ultrasound beamformers, selecting transducer elements and conditioning paths. IC Role / Device Role / Timing Role: Bidirectional analog switch handling bipolar RF receive signals with rail-to-rail swing. Use Value: ±15 V analog range and symmetric on-resistance support full-scale echo signal fidelity without distortion or clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4617ESE+ | Higher RDS(on) (75 Ω typ.), lower supply voltage range (±5 V max), no VL pin - uses same V+ for logic | Suitable only for low-voltage (<5 V analog) systems; not compatible with ±15 V signal paths | Select when board space is constrained and analog range ≤ ±5 V; requires redesign of supply and logic interface |
| ADG1414BRUZ | Lower RDS(on) (1.3 Ω typ.), higher cost, requires external logic level translation for 3.3 V controllers | Better for high-precision, low-distortion applications (e.g., 16-bit DAQ), but incompatible with legacy 5 V TTL control | Choose for new designs demanding <2 Ω on-resistance and <0.5 pC charge injection; verify logic interface compatibility |
Compared with DG444BDJ, MAX4617ESE+ sacrifices analog voltage range and rail-to-rail capability for smaller package and lower power, while ADG1414BRUZ delivers superior analog performance at higher cost and complexity - making DG444BDJ the optimal balance of speed, voltage range, and ease of integration in industrial and medical analog signal chains.
Availability
DG444BDJ is available at Aetrix Electronics and suitable for data acquisition systems, medical instrumentation, automatic test equipment, and audio signal routing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DG444BDJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay Siliconix is a global semiconductor manufacturer specializing in discrete MOSFETs, analog switches, diodes, and power ICs, with emphasis on high-reliability, high-performance analog solutions.
The DG444BDJ belongs to Vishay's DG44xB family of improved quad SPST analog switches, engineered specifically for precision analog signal routing in instrumentation, test, and medical applications where low distortion, low charge injection, and wide supply tolerance are essential.
FAQ
What is the maximum analog signal voltage range supported by the DG444BDJ?
The DG444BDJ supports an analog signal range of ±15 V when operated with dual supplies (V+ = +15 V, V− = −15 V), or 0–12 V with unipolar supply (V+ = 12 V, V− = 0 V). This rail-to-rail capability ensures full utilization of ADC input ranges and prevents clipping in high-dynamic-range systems. Signals exceeding these limits are clamped by internal diodes, so external protection is recommended beyond absolute maximum ratings.
Does the DG444BDJ require a separate logic supply voltage, and why?
Yes, the DG444BDJ requires a dedicated VL pin supplied at 5 V to power its TTL/CMOS-compatible input stage. This separation allows the digital control interface to operate independently from the analog supply rails (V+, V−), preventing noise coupling and ensuring reliable switching even when analog supplies are asymmetric or floating. The VL pin must be decoupled with a 0.1 µF ceramic capacitor to GND.
How does the DG444BDJ minimize pedestal error in sample-and-hold circuits?
The DG444BDJ minimizes pedestal error primarily through ultra-low charge injection of 4 pC typical at 8 V, as verified in Figure 3 and page 5 of the datasheet. When the switch opens during hold phase, this small injected charge produces minimal voltage step (ΔV = Q/CHOLD) on the hold capacitor - e.g., <4 µV on a 1 nF capacitor - preserving DC accuracy in precision measurement systems like ECG or pH analyzers.
Can the DG444BDJ be used with single-supply 3.3 V logic controllers?
No - the DG444BDJ requires a 5 V logic supply on the VL pin and has TTL-compatible input thresholds (0.8 V low, 2.4 V high). Driving INx pins directly from 3.3 V logic may result in marginal or undefined switching behavior. A level translator (e.g., TXB0104) or 5 V buffer is required to ensure reliable operation with 3.3 V microcontrollers or FPGAs.
What is the thermal derating behavior of the DG444BDJ in the 16-pin DIP package?
In the 16-pin plastic DIP package, the DG444BDJ has a power dissipation limit of 470 mW at 25 °C, with linear derating of 6 mW/°C above 75 °C. At 105 °C ambient, maximum allowable power drops to 470 mW − (105 − 75) × 6 mW = 290 mW. This must be considered in thermally constrained enclosures or high-density PCB layouts where junction temperature could exceed safe operating limits.
DG444BDJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 80Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 13V ~ 36V
- Voltage - Supply, Dual (V±):
- ±7V ~ 22V
- Switch Time (Ton, Toff) (Max):
- 300ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 5pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -95dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
DG444BDJ FAQ
1.How can I place an order for DG444BDJ through Aetrix?
Please submit a Request for Quotation (RFQ) for DG444BDJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DG444BDJ reliable?
The price and inventory of DG444BDJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DG444BDJ is usually 5 days.
3.What payment methods are accepted for DG444BDJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DG444BDJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DG444BDJ?
DG444BDJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DG444BDJ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DG444BDJ?
For technical support, including DG444BDJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DG444BDJ requirements.
6.How does Aetrix verify that DG444BDJ is sourced from the original manufacturer or authorized distributors?
All DG444BDJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DG444BDJ meets industry standards.
7.What is the process for return or replacement of DG444BDJ?
All DG444BDJ units undergo pre-shipment inspection (PSI). If there is an issue with DG444BDJ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DG444BDJ part is unused and in its original packaging.
Return procedure for DG444BDJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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